Power tire-pump.



F. G. FOLBERTH.

POWER TIRE PUMP.

APPLICATION FILED MAY 13, 1913.

1,168,296. Patented Jan.18, 1916.

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F. G. FOLBERTH.

POWER TIRE PUMP.

APPLICATION HLED MAY I3. 1913.

Patented Jan. 18,-1916.

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Gum/"e135 Witnesses W UMBIA PLANOGRAP 0., WASHINGTON D c UNTTED STATES PATENT @FFTQE.

FREDERICK G'. FOLBERTH, OF CLEVELAND, OHIO.

POWER TIRE-PUMP.

Application filed May 13 To all whom it may concern Be it known that I, Fnnnnnron Gr. FoL- nnn'rn, a citizen of the United States, and resident of Cleveland, county of Cuyahoga, and State of Ohio, and whose post-office address is 2929 Lorain avenue, Cleveland, Ohio, have made certain new and useful Improvements in Power Tire Pumps, of which the following is a specification.

The present invention relates to an attachment for explosion engines comprising an air pump having its casing permanently connected with the cylinder of such an engine and the stem of its piston extending into the engine cylinder to be actuated by the piston therein.

The attachment is particularly designed for use in inflating the tires of motor vehicles or compressing air into a suitable reservoir on the vehicle. Attachments of this kind as heretofore constructed have required manual adjustment of parts to positively connect or disconnect the stem of the pump piston and the head of the engine piston, or included a spring by means of which contact was maintained between said pistons during the upward stroke of the engine piston. By the present invention the necessity for employing such a spring, or for positively locking the pump piston to the piston of the engine is avoided and means are provided whereby, when it is desired to operate the pump, the necessary contact of the piston stem thereof with the engine piston is maintained by the suction created by the inward stroke of the engine piston.

In the accompanying drawings-Figure 1 is an elevation of a portion of a multiple cylinder explosion engine having the present invention applied thereto: Fig. 2 is a vertical sectional view, on an enlarged scale, through the pump and a portion of the engine: Fig. 3 is a sectional view of a portion of the pump showing the controlling valve in a different position from that illustrated in Fig. 2, being substantially on the line 33 of Fig. 6: Fig. 4 is a sectional view substantially on the line 4l4.of Fig. 6: Fig. 5 is a sectional view on the line 55 of Fig. 6: and Fig. 6 is a sectional view on the line 66 of Fig. 5.

Referring to the drawings, 1 designates a cylinder of an explosion engine within which is fitted a reciprocating piston 2 the cylinder being shown as connected with an intake conduit or manifold 3 through a port Specification of Letters Patent.

Fatented Jan. 18, 1916.

Seria11\T0. 767,348.

is shown screwed into a suitable aperture in V the head of the engine cylinder. Said casing comprises a piston chamber 6 and a side conduit or duct 7 extending longitudinally of said chamber and communicating therewith adjacent its lower end through an opening 8. The stem9 of the pump piston 10 extends through the bottom of the pump casing and into the engine cylinder in position to be actuated by the piston 2 therein during its outward movement. A conduit 11 connects the intake or manifold 3 of the engine with a port 12 in the upper portion of the pump casing and said port 12 is as shown in Fig. 2 adapted to be placed in communication with the duct 7 by a passage 13 in a rotary plug valve 14:. Air is admitted to the chamber 6 of the pump, above the piston, through a duct 15, being controlled by a valve 16. The outlet for compressed air from the pump is indicated at 17, the same being controlled by an ordinary ball valve 18. At its upper end the piston chamber of the pump communicates with a duct. or passage 19 formed in the pump casing. This duct 19 is provided with a lateral branch which when the valve 1A is adjusted into the position shown in Fig. 3 is connected, through a passage 20 in the valve, with the aforesaid port or opening 12 of the pump casing and the conduit 11 which connects with the intake or manifold 3 of the engine. The valve 14 has formed therein, in addition to the passages 13, 20 a duct 22 which when the parts are adjusted as shown in Fig. 2 is in alinement with the air inlet duct 15 and when said valve is rotated to the position shown in Fig. 3 it will be readily seen that it closes both said inlet duct 15 and the duct 7.

The operation and manner of using the improvement will be readily understood from the foregoing description and the It will be seen that when the drawings. parts are in the position shown in Flg. 2 the suction created in the intake plpe or manifold 3 will withdraw air from the chamber of the pump below its piston so that the latter will be automatically held in contact with the engine piston 2 throughout the inward stroke of the latter, during which the valve 16 opens and air will thus be drawn into the pump through the duct 15. It will be understood that when the pump is in operation the valve 14 opens the duct 15 and also connects the duct 7 with the port 12. During the outward stroke of the engine piston 2 the air compressed in the pump will be dis charged through the outlet 17 and can be by suitable connections conducted to a tire of the vehicle or to a suitable reservoir as desired. When it is not desired to operate the pump it is merely necessary to turn the valve 1&- into the position shown in Fig. 3 in which communication between the duct 7 and conduit 11 is cut off and communication is established, through the passage 20, between the interior of the pump chamber above the piston therein and the conduit 11. WVith the parts in thisposition also the inlet duct 15 is closed and the suction created in the intake pipe or manifold 3 will act to maintain the piston 10 in its outer or uppermost position wherein the inner or lower end of its stem is at the limit of the outward movement of the engine piston 2.

It will be seen that the present invention permits of the pump being permanently con nected with the engine cylinder and provides for automatically maintaining the stem of its piston in contact with the engine piston throughout the movement of the latter or for retaining it in position Where it will not be actuated by the engine piston.

The portion of the pump piston stem which extends within the engine cylinder is preferably of greater diameter than the body of said stem and the tapering portion 21 of said stem is adapted to fit closely in a suitable ground seat at the lower end of the member 5 of the pump casing when the piston 10'is at the limit of its upward movement. This effectively prevents any possible leakage from the engine cylinder into the casing of the pump.

Having thus described the invention what is claimed is:

1. The combination with a cylinder and piston of an explosion engine, of an air pump having its casing connected with said cylinder and its piston stem extending into contact with the piston therein, and means connecting the engine cylinder and pump casing whereby the suction created during the inward stroke of the engine piston may be utilized to cause the pump piston stem to remain in contact with the engine piston throughout said stroke of the latter.

tifz'vp'ies 61 this patent may be obtained for 2. The combination with a cylinder and piston of an explosion engine, of an air pump having its casing connected with said cylinder and its piston stem extending into contact with the piston therein, and means connecting the engine cylinder with the casing of the pump between the piston in the latter and the engine cylinder, substantially as and for the purpose described.

3. The combination with a cylinder and piston of an explosion engine, of a pump having its piston stem extending into the engine cylinder and its casing connected with said cylinder by means including an. adjustable valve adapted to establish communication between the engine cylinder and either of the two sections of the pump casing 011 opposite sides of the piston therein.

4. The combination with a cylinder and piston of an explosion engine, of a pump having its piston. stem extending into the engine cylinder and the portion of its casing between the piston therein and the engine cylinder connected with the latter, and; a valve adapted to open and close said con-- nection between the pump casing and engine cylinderindependent of any adjustment of the pump piston.

. 5. The combination with a cylinder and.

piston of an explosion engine, of a pump having its piston stem extending into the engine cylinder and the section of its casing between the piston therein and the engine cylinder connected with the latter, and a valve adapted to simultaneously open and close both said connection between the pump casing and engine cylinder and the air inlet to the pump casing.

6. The combination with a cylinder, pis

ton, and intake duct of an explosion engine, of an air pump having its piston stem extending into the engine cylinder in position to contact with the piston. therein, and a connection between the pump casing below the piston therein and the intake duct of the engine. 2

. 7. The combination with a cylinder, piston, and intake duct of an explosion engine, of an air pump mounted on the head of the engine cylinder and having the stem of its piston extending into the engine cylinder in position to be actuated by the piston therein, and means adapted to connect the intake duct of the engine with the casing five cents each, by addressing the Commissioner of Patents, 7 Washington, D. c." 1 

